OEM Chrysler 300M Rod Bearing

Chrysler 300M Rod Bearing Parts and Q&A

• Connecting Rod Bearing
  4626657AD
  Q: How Can Rod Bearings Be Properly Marked and Installed for Accurate Assembly on Chrysler 300M?

  A:

  When taking off the bearing caps, remember to mark them so they go back in the same place; they are not alike. While assembling the bearing shells, each cap's tang should be inserted into the hole cut into its rod and the position of the cap tangs should align with the rod on the same side. Keep loading the bank with rods one after another until the job is complete, making sure taper or roundness on the Crankshaft journals always measures 0.015 mm (0.0006 in.) or less. Find bearings in regular, 0.025 mm (0.001 in.) and 0.254 mm (0.010 in.) sizes that are usually installed in pairs, so keep them separate; never combine a new and old half by filing the rods or bearing caps. To find the right clearance for main bearings and connecting rod bearings, use plastigage and refer to the clearance guidelines. Examine the rod bearing bolts and if you find any necking, then replace them with new bolts. To check for stretching, hold a scale against the threads of the connecting rod bolts; if some threads remain uncontacted, you have to put in a new bolt. Apply some engine oil to the threads before placing the nuts and finger tighten them all before using a wrench to torque each nut equally. To measure the connecting rod side clearance, attach a dial indicator to a fixed position on the engine, put the probe against the rod cap, zero the indicator with the rod in its rear position, move the rod forward to take a reading, use these readings to check against specs and repeat as you turn the crankshaft to access all the rods.